BASIC returns run-time error messages if an error occurs while a program
is executing. BASIC diagnoses the error and indicates the program line
that generated the error. Warning error messages indicate that an error
has occurred, but program execution continues. In some cases, VAX BASIC
re-prompts for more information or correct data. In other cases, BASIC
performs the specified operation, but the results are not as expected.
Fatal error messages indicate that the program has aborted. You can
recover from most fatal errors by including error-handling routines in
your program. Certain errors, however, are not recoverable even when
error-handlers are used. In the description of these errors, they are
designated as not trappable. You do not need error-handling routines to
trap errors that generate warning messages.
Additional Information:
explode
extract